Microplastics thermal treatment by polyethylene terephthalate-biomass gasification

Tavares, Raquel; Ramos, Ana; Rouboa, Abel

doi:10.1016/j.enconman.2018.02.001

Cited by 52 publications

(10 citation statements)

References 57 publications

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“…For gasification, the operating condition was selected to be 850 °C and 3.5 MPa with steam as the gasifying agent for H 2rich production 13,86,87 . In Aspen Plus, the gasification was modeled with two reactors in sequence using RStoic and RGibbs, which is consistent with previous process simulations for gasification 40,[88][89][90][91][92][93] . The RStoic reactor decomposes the inlet stream based on the feedstock compositions.…”

Section: Methodssupporting

confidence: 62%

Feasibility of gasifying mixed plastic waste for hydrogen production and carbon capture and storage

Lan

Yao

2022

Commun Earth Environ

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Waste plastic gasification for hydrogen production combined with carbon capture and storage is one technology option to address the plastic waste challenge. Here, we conducted a techno-economic analysis and life cycle assessment to assess this option. The minimum hydrogen selling price of a 2000 oven-dry metric ton/day mixed plastic waste plant with carbon capture and storage is US$2.26–2.94 kg−1 hydrogen, which can compete with fossil fuel hydrogen with carbon capture and storage (US$1.21–2.62 kg−1 hydrogen) and current electrolysis hydrogen (US$3.20–7.70 kg−1 hydrogen). An improvement analysis outlines the roadmap for reducing the average minimum hydrogen selling price from US$2.60 to US$1.46 kg−1 hydrogen, which can be further lowered to US$1.06 kg−1 hydrogen if carbon credits are close to the carbon capture and storage costs along with low feedstock cost. The life cycle assessment results show that hydrogen derived from mixed plastic waste has lower environmental impacts than single-stream plastics.

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Section: Methodssupporting

confidence: 62%

Feasibility of gasifying mixed plastic waste for hydrogen production and carbon capture and storage

Lan

Yao

2022

Commun Earth Environ

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“…If conveniently processed, waste may be considered as a renewable energy source as widely reported ( Rizwan et al, 2018 ; Fodor and Klemeš, 2012 ; Ng et al, 2014 ; Themelis et al, 2002 ; Young, 2010 ). Technology related to waste treatment is now at the forefront of development, aiming to manage large amounts of waste in the most sustainable way ( Rizwan et al, 2018 ; Fruergaard et al, 2010 ; Tavares et al, 2018 ). Thermal treatments are one of the most commonly employed procedures to deal with numerous waste streams including MSW ( Pavlas et al, 2010 ; Tavares et al, 2019 ), achieving mass reductions of 70–80% and volume reductions of 80–90% ( Bosmans et al, 2013 ; Münster and Meibom, 2011 ).…”

Section: Lca Overview For Thermal Conversion Techniquesmentioning

confidence: 99%

Renewable energy from solid waste: life cycle analysis and social welfare

Ramos

Rouboa

2020

Environmental Impact Assessment Review

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In this study, municipal solid waste (MSW) composition in distinct world locations is compared and a case study is assessed. Three waste-to-energy (WtE) techniques are employed within the framework of an industrial partnership. Life cycle assessment (LCA) and a brief social contextualization including the production of renewable energy from the waste generated worldwide were held to attain a holistic view and attract the interest of multiple stakeholders. Incineration depicted a sustainable profile with improved results for global warming potential and terrestrial ecotoxicity potential. Regular gasification revealed the best results for eutrophication, acidification, marine aquatic ecotoxicity and human toxicity potential. Two-stage plasma gasification showed negative values for all impact categories i.e. achieving environmental credits. The estimate of the electricity produced from the waste generated per capita showed a fair coverage of the electrical demand in distinct world areas. To the best of the authors' knowledge, there are no reports connecting the electricity use, the waste production and the renewable energy achieved from WtE for different world regions. Therefore, this study supports the replacement of fossil fuels with renewable alternatives, reducing greenhouse gas emissions while maintaining the comfort and commodities suitable for a comfortable quality of life.

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“…Recently, these strategies and technologies have been comprehensively reviewed and discussed. 23 Technologies such as cogasification, 24 thermal pyrolysis, 25 and microwaveinitiated catalytic reactions 26 activated sludge process and a pilot-scale membrane bioreactor; there are approximately 1 × 10 7 MPs discharged daily in the final effluent. 27 MP removal by adsorption or filtration is an effective way to relieve MP contamination, but MPs still exist in the adsorbents/membrane and require further treatments.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Recently, these strategies and technologies have been comprehensively reviewed and discussed . Technologies such as cogasification, thermal pyrolysis, and microwave-initiated catalytic reactions have been proved effective to remove MPs. However, these techniques were based on solid-state reactions.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Microplastics by a Thermal Fenton Reaction

et al. 2021

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Microplastics (MPs) are ubiquitous in the environment and are infiltrating the food chain, causing potential risks to living beings. However, current methods of MP removal from an aqueous environment are limited by low efficiency. Advanced oxidation processes (AOPs) are emerging techniques for MP purification. Herein, a hydrothermal coupled Fenton system is developed for decomposition of ultrahigh-molecular-weight polyethylene, achieving 95.9% weight loss in 16 h and 75.6% mineralization efficiency in 12 h. The high effectiveness is attributed to the synergy of hydrothermal hydrolysis, proton-rich environment, and massive production of hydroxyl radicals. The system is also efficient to remediate different petroleum-based plastics and maintains high efficiency in practical water bodies. Characterizations revealed a two-stage degradation process: chain unfolding/stretching and oxidation, giving rise to the formation of carbonyl groups and decreased crystallinity of MPs during the hydrothermal treatment. The chain stretching stage is pivotal to the whole treatment because it remarkably facilitates subsequent chain cleavage and Fenton oxidation. This study provides a new approach to removing MPs in water bodies and new insights into MP degradation by the AOP technology.

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Microplastics thermal treatment by polyethylene terephthalate-biomass gasification

Cited by 52 publications

References 57 publications

Feasibility of gasifying mixed plastic waste for hydrogen production and carbon capture and storage

Feasibility of gasifying mixed plastic waste for hydrogen production and carbon capture and storage

Renewable energy from solid waste: life cycle analysis and social welfare

Degradation of Microplastics by a Thermal Fenton Reaction

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